PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-17:43:00
G07     23.4           67.5                9.8 +/-    0.50      10.5 +/-    0.50  0.060 / 0.110
G08     68.1           49.5               10.1 +/-    0.50      12.8 +/-    0.50  0.060 / 0.120
G09     181.7          55.4               13.5 +/-    1.94      16.0 +/-    1.94  0.030 / 0.040
G11     132.2          25.8               11.5 +/-    1.43      22.1 +/-    1.43  0.030 / 0.030
G23     159.6          23.5               10.9 +/-    1.76      22.1 +/-    1.76  0.050 / 0.040
G27     43.1           21.6                8.2 +/-    0.92      17.4 +/-    0.92  0.040 / 0.060
G28     251.4          38.7               13.6 +/-    1.32      20.2 +/-    1.32  0.070 / 0.130
G30     318.0          49.2               10.9 +/-    0.71      13.9 +/-    0.71  0.070 / 0.170